231156100 has 144 divisors (see below), whose sum is σ = 606211200. Its totient is φ = 74833920.

The previous prime is 231156091. The next prime is 231156113. The reversal of 231156100 is 1651132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1197604 + ... + 1197796.

It is an arithmetic number, because the mean of its divisors is an integer number (4209800).

Almost surely, 2^231156100 is an apocalyptic number.

231156100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231156100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303105600).

231156100 is an abundant number, since it is smaller than the sum of its proper divisors (375055100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231156100 is a wasteful number, since it uses less digits than its factorization.

231156100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 231156100 is about 15203.8185992862. The cubic root of 231156100 is about 613.7174231198.

The spelling of 231156100 in words is "two hundred thirty-one million, one hundred fifty-six thousand, one hundred".